Lifting-jack.



tion 6, and for the dowel 8 to enter and enstandard section 19 provided,at its upper end, with a socket or recess -20 to receive the dowel 8,and, adjacent its lower end, with a lateral pin disposed to projectoutward through the slot 3-4 and equipped, at its outer end, with amilled head 21, there being formed on the front edge 'of'the section .19a series of teeth 22 disposed and arranged Disposed Vwithin the casing.

of the to form a continuation of the ratchet 9, and

for engagement by the pawls 10 and 11, aS. presently explained. l

at one side standard actuating (shown by dotted lines in Fig. l), is atrip member or plate 23, formed to provide a lower finger 24 and anupper finger 25 positioned for engagement respectively with the pins 14and 15, there being also pivoted in A mg and vto effect tion oftheoperationlever 16, the pawls 1 0 f and 11 will 'be actuated forfeeding the secplate 23 rearwardly,

the, casing a reversing lever 26 .having a cam portion 27 disposed forengagement as at 28with the lower end of the plate 23.

vIn the operation of the device, suitable manipulation of the operatinglever 16 will cause the lplawl 10 to feed-the jack standard v upward tough engagement ofsaid pawl with the teeth 9, as will be readilyunderstood. As the standard advances, and during the return stroke ofthe pawl 10, when the lever 16 is swung upwardly, retrograde movement ofthe'v standard is prevented,

thrugh engagement of the pawl 11 with the rack 9, as usual. vAfter thestandard section' -6 has been advanced 'to the limit of its movement,should further elevation of the Work .the secondV orbeing handled benecessary, auxiliary vsection 19 ofthe standard is moved forwardly fromits compartment 5 andup-f 'wardly to position beneath the section 6, als

illustrated in Fig.p4, this movement ofthe section 19 being Aefectedmanually by grasption 19 to proper position beneath the secgage thesocket 20. By a further manipulation 19 upwardly as a continuation ofsection 6, as isobvious, and whereby thevehicle or other work beinglifted by the jack `may be brought When it is desired `to the desiredelevation.

ard, the reversingv lever 2,6A isA moved downwardly in the directionindicated by the-ar row inV Fig. 1, whereby a leaf spring 29 arranged inthe casing will throw the trip causing the finger 25'V to engage pin 15and move the pawl 11 out of engagement with the rack 9-22. `When thelever 16is now manipulated, the stand-.

ard will follow pawl 10 downwardly until pin 14 strikes behind thefinger 24 and thus mechanism suitably manipulatingthe head 21' movementof the part 19, it being' apparent.l that, during this operation, the"Apin traveling in slot 3-4 will guide the secwhereby the liftingforcestandard sections normally to lower the jack standthis inventionprovision 'is made for bringing into action at will an auxiliarystandard section which, when in operation, forms in effect a part and acontinuation of the main 'section 6, and further that the lifting andretaining pawls included in the actuating mechanism are so arranged andoperated vthat they both engage at the same side of the standard, thusrendering necessary the formation of teeth upon one side only ofthelatter. It will also be noted that under this construction the severalsections of the standard operate in a direct axial line, and furtherthat, through the endwise abutment of the sections relatively, there isno weakening ofthe standards at the joints, ,and that, in consequence,the lifting forceA applied will be uniform throughout the, whole' lengthof the sectional standard.

It is obvlous that various-changes maybe made in the details ofconstruction .without departing from the spirit of this invention. 1tis, therefore, to be understood thatthis mvention is notto be ilimitedto the specific construction shown and described. Having thus describedthe invention, what is claimed is:

1.l A .lifting jack comprising a sectional standard, said sections beingadapted for end- Vwise abutment and to stand in am'al alinement; wherebythe lifting force of the standard is applied uniform throughout thewhole length of its several sections.

2. A lifting jaekcomprising a sectional standard, said sections beingnormally dlsconnected and adapted for assemblage to abut endwis'e andstand in .axial alinement; of the standard is applied uniform throughoutthe whole length of its'several sections. I

3. A lifting `jack comprising a pair of,

disconnected and disposed laterally one of the other, means for movingthe second of said sections into position in axial .alinement with theadvance section, and actuating means for advancing said sectionssuccessively and in continuation one of the other.

' 4L A'lifting jack comprlsmg a -casmghaving a lateral compartment, avertically movable standard section in said casing, actuating means :foradvancing said section, and

a second section normally disposed in said compartment and .operativelyarranged v to the advance section, and actuating means for be' broughtinto line with and form a con .advancing said sections successively andin -tinuation of the rst section.vv f continuation one of the other. 1D5,. A lifting jack comprising a pair ofv In testimony whereof I affix mysignature .I E standard sections normally disposed in juX-4 v this 3rdday of August, 1915.

taposition,- the second of said sections being l movable toa position inaxial 'alinement with JACOB MERZ.

